SHELDON INGRAM TELLS US THIS SCHEME IS MORE DANGEROUS AND MORE FREQUENT. Reporter: THE 320-PLUS UPMC EMPLOYEES NOW JOIN 1.2 MILLION OTHER PEOPLE WHO ARE ALSO VIC TIMES OF AN IDENTITY THEFT TAX FRAUD SCHEME. 5 MILLION WERE INTERCEPTED BY THE IRS LAST YEAR. THIS IS AN ONGOING THING. IT'S NOT A SURPRISE. Reporter: A TAX ATTORNEY WITH SCULLY AND SCULLY LAW FORM SAYS IDENTITY THIEVES ARE WORKING TIRELESSLY TO GAIN SOCIAL SECURITY TO CREATE BOGUS TAX RETURNS, THAT IS WHAT SCULLY AND SCULLY BELIEVED HAPPENED TO MORE THAN 320 PLEASE AT UPMC. SOMEONE WAS ABLE TO GAIN ACCESS TO PERSONAL INFORMATION. IT SOUNDS LIKE THAT WOULD BE THIS SITUATION WHERE A BATCH OF SOCIAL SECURITY NUMBERS WERE STOLEN AND BOGUS TAX RETURNS WERE FILED. Reporter: UPMC EMPLOYEES ARE JUST THE LATEST GROUP OF VICTIM, SCULLY AND SCULLY SAYS HERE ARE WAYS TO PREVENT YOU FROM BECOMING THE NEXT VICTIM, FILE YOUR RETURNS EARLY. DON'T USE PUBLIC WI-FI TO FILE AND KEEP TAX INFORMATION IN A PRIVATE AREA. BUT HACKERS CAN FIND OTHER WAYS TO DANCE THEIR WAY INTO YOUR PERSONAL LIVES, THAT'S WHAT HAPPENED TO DENNA WHEN SHE LAUNCHED A FUNDRAISE ER ON KICK KICKSTARTER. IT TOOK WEEKS TO GET APPROVED AND THE HACK HAPPENED LITERALLY THE DAY AFTER I LAUNCHED PROJECT. Reporter: TRYING TO OPEN A FITNESS STUDIO AND OOFRGFFERING FREE CLASSES TO SENIORS, BUT THE IDENTITY THEFT MY AFFECT THE DREAM. THE PROJECT IS FOR THE COMMUNITY. Reporter: AS FOR UPMC, IT HAS NOT SAID HOW ITS SYSTEM WAS

Hillary Clinton did not have a State Department email account while she served as America's top diplomat, a senior state department official said Monday, and instead used a personal email account during her four years on the job.